Isolated in the Arenteiro Valley this Trappist monastery is popular with its pilgrims on the Camino de Santiago. Declared as a National Monument, Oseira monastery is in existence since 1137. Saint Bernard had sent an order of French monks to the monastery in 1141 and after centuries of maintenance they left in 1835. They returned in 1929 and rebuilt the destroyed portions of the monastery.

The Church was built in a classic Roman style. Taking inspirations from Preregrination churches it is considered as a landmark of Roman architecture in the Spanish Peninsula.

Inside, the main chamber is known as ‘palm tree room’ and boasts of a dome supported by four columns.

It also has a lapidarium which is a collection of stone pieces obtained during restoration.

Apparently, today there are only 13 monks in the monastery. They also have a small shop where they sell souvenirs, cheese, honey and liquor made by them and it is also where the pilgrims can get their books stamped.